Do not remove radiator cap when engine is hot; steam and hot coolant can escape and burn
personnel. Use extreme care when removing the radiator pressure cap. Sudden release or pressure
can cause a steam flash which could seriously injure personnel. Slowly loosen cap to the first stop to
relieve pressure before removing cap completely. After use securely tighten cap. Use a clean, thick
waste cloth or like material to remove cap. Avoid using gloves. If hot water soaks through gloves,
personnel could be burned.
(1) Remove radiator cap.
(a) Inspect coolant in radiator for
oil floating on top. If oil is
present, indicates faulty oil
cooler core. Repair or replace
(b) If oil is not present in radiator
coolant, notify supervisor.